Plotinus (Greek: Πλωτῖνος) (ca. AD 204–270) was a major philosopher of the ancient worl who is widely considered the founder of Neoplatonism (along with his teacher Ammonius Saccas.) Much of our biographical information about him comes from Porphyry's preface to his edition of Plotinus' Enneads. His metaphysical writings have inspired centuries of Pagan, Christian, Jewish, Islamic and Gnostic metaphysicians and mystics.